package J20250728; import java.util.Properties; import java.util.Set; /** * @author WanJl * @version 1.0 * @title Demo04_Properties * @description * @create 2025/7/28 */ public class Demo04_Properties { public static void main(String[] args) { //创建一个Properties集合对象 Properties prop=new Properties(); //存储元素---不需要使用了,有新的方法 prop.put("name","张三"); prop.put("age","25"); prop.put("sex","男"); prop.put("username","zhangsan"); prop.put("password","123456"); //遍历集合 Set keySet = prop.keySet(); for(Object key: keySet){ Object value = prop.get(key); System.out.println(key+"->"+value); } } }